525 kV HVDC

13 MIND DATASHEET | Submarine Dimensional data for 1200 mm2 aluminum Electrical data for 1200 mm2 aluminum Indicative diameter 135 mm Indicative cable weight 30 kg/m Ohmic resistance 0.0247 Ω/km Coaxial inductance 0.16 mH/km Capacitance 0.33 µF/km INNER SEMI-CONDUCTIVE LAYER Carbon black paper layers OUTER SEMI-CONDUCTIVE LAYER Carbon black and metallized paper layers. ANTI-CORROSION SHEATH An extruded layer of semiconductive polyethylene compound, to avoid any electrical breakdown by induced over-voltages. Insulating polyethylene is also available for metallic armours. SERVING Two layers of polypropylene strings, to protect against abrasion and reduce cable friction. CONDUCTOR Aluminum keystone conductors, with nominal cross-section area up to 2500 mm². Copper is also available. INSULATION High density wood pulp paper tapes, impregnated with fully degasified special viscous compound. METALLIC SHEATH The insulated core has a lead alloy sheath applied over the longitudinal water barrier. REINFORCEMENT One layer of steel tapes, to allow for proper thermal expansion and contraction of the MIND insulation. ARMOUR Double layer of composite wires, specially designed for high depth applications, combining light weight features with high tensile strength performances. Steel wires or single layers designs are also available.

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